Buggy code:
setContentPane ( contentPane ) ; contentPane . setLayout ( null ) ; UtilDateModel model = new UtilDateModel ( ) ; Properties p = new Properties ( ) ; p . put ( "text.today" , "Today" ) ; p . put ( "text.month" , "Month" ) ; p . put ( "text.year" , "Year" ) ; JDatePanelImpl datePanel = new JDatePanelImpl ( model , p ) ; datePicker = new JDatePickerImpl ( datePanel , new DateLabelFormatter ( ) ) ; title = new JLabel ( "NOTA<seq2seq4repair_space>DE<seq2seq4repair_space>RECEPCIÓN<seq2seq4repair_space>DE<seq2seq4repair_space>EXTINTORES" ) ; title . setFont ( new Font ( "Arial" , Font . PLAIN , 26 ) ) ; idShower = new JLabel ( "Nº<seq2seq4repair_space>000001" ) ; idShower . setFont ( new Font ( "Courier<seq2seq4repair_space>New" , Font . PLAIN , 20 ) ) ; nameLbl = new JLabel ( "Señor(es)" ) ; clientName = new JTextField ( ) ; phoneLbl = new JLabel ( "Telf//Cel" ) ; clientPhone = new JTextField ( ) ; compLbl = new JLabel ( "Empresa" ) ; clientComp = new JTextField ( ) ; String [ ] columnNames = new String [ ] { "Cant." , "No.<seq2seq4repair_space>Extintor" , "Descripcion//Marca" , "Tipo" , "Capacidad" , "Obs" } ; Object [ ] [ ] tempData = new Object [ ] [ ] { new Object [ ] { 1 , "57885" , "Extintor<seq2seq4repair_space>chino<seq2seq4repair_space>c//Pico" , "PQ" , "3<seq2seq4repair_space>Lb" , "En<seq2seq4repair_space>periodo<seq2seq4repair_space>de<seq2seq4repair_space>garantia" } } ; contentTable = new JTable ( tempData , columnNames ) ; contentTable . setFont ( new Font ( "Arial" , Font . PLAIN , 16 ) ) ; contentTable . setRowHeight ( 25 ) ; contentTable . getColumnModel ( ) . getColumn ( 0 ) . setPreferredWidth ( 20 ) ; contentTable . getColumnModel ( ) . getColumn ( 1 ) . setPreferredWidth ( 60 ) ; contentTable . getColumnModel ( ) . getColumn ( 2 ) . setPreferredWidth ( 200 ) ; contentTable . getColumnModel ( ) . getColumn ( 3 ) . setPreferredWidth ( 20 ) ; contentTable . getColumnModel ( ) . getColumn ( 4 ) . setPreferredWidth ( 50 ) ; contentTable . getColumnModel ( ) . getColumn ( 5 ) . setMinWidth ( 170 ) ; contentTable . setAutoResizeMode ( JTable . AUTO_RESIZE_LAST_COLUMN ) ; JScrollPane tablesp = new JScrollPane ( contentTable ) ; quantLbl = new JLabel ( "Cant.<seq2seq4repair_space>Total" ) ; quantAmount = new JTextField ( ) ; amountLbl = new JLabel ( "Monto<seq2seq4repair_space>a<seq2seq4repair_space>pagar<seq2seq4repair_space>(Bs)" ) ; totalLbl = new JLabel ( "Total" ) ; totalAmount = new JTextField ( ) ; ACLbl = new JLabel ( "A//C" ) ; ACAmount = new JTextField ( ) ; balanceLbl = new JLabel ( "Saldo" ) ; balanceAmount = new JTextField ( ) ; dateLbl = new JLabel ( "Fecha<seq2seq4repair_space>de<seq2seq4repair_space>entrega" ) ; dateField = new JDatePickerImpl ( datePanel , new DateLabelFormatter ( ) ) ; hourLbl = new JLabel ( "Hora" ) ; hourField = new JTextField ( ) ; jButton1 = new JButton ( ) ; jButton1 . setText ( "OK" ) ; title . setBounds ( 120 , 20 , 500 , 30 ) ; datePicker . setBounds ( 300 , 90 , 150 , 30 ) ; idShower . setBounds ( 500 , 90 , 150 , 30 ) ; nameLbl . setBounds ( 40 , 130 , 150 , 30 ) ; clientName . setBounds ( 100 , 130 , 350 , 30 ) ; compLbl . setBounds ( 40 , 160 , 150 , 30 ) ; clientComp . setBounds ( 100 , 160 , 350 , 30 ) ; phoneLbl . setBounds ( 465 , 130 , 150 , 30 ) ; clientPhone . setBounds ( 510 , 130 , 150 , 30 ) ; tablesp . setBounds ( 30 , 200 , 640 , 150 ) ; quantLbl . setBounds ( 30 , 350 , 70 , 30 ) ; quantAmount . setBounds ( 90 , 350 , 50 , 30 ) ; dateLbl . setBounds ( 150 , 345 , 110 , 30 ) ; dateField . setBounds ( 150 , 370 , 130 , 30 ) ; hourLbl . setBounds ( 150 , 390 , 50 , 30 ) ; hourField . setBounds ( 150 , 410 , 90 , 30 ) ; amountLbl . setBounds ( 320 , 370 , 120 , 30 ) ; totalLbl . setBounds ( 430 , 350 , 50 , 30 ) ; totalAmount . setBounds ( 430 , 370 , 70 , 30 ) ; ACLbl . setBounds ( 500 , 350 , 50 , 30 ) ; ACAmount . setBounds ( 500 , 370 , 70 , 30 ) ; balanceLbl . setBounds ( 570 , 350 , 50 , 30 ) ; balanceAmount . setBounds ( 570 , 370 , 70 , 30 ) ; <START_BUG> jButton1 . setBounds ( 350 , 430 , ( - 1 ) , 30 ) ; <END_BUG> contentPane . add ( title ) ; contentPane . add ( datePicker ) ; contentPane . add ( idShower ) ; contentPane . add ( nameLbl ) ; contentPane . add ( clientName ) ; contentPane . add ( compLbl ) ; contentPane . add ( clientComp ) ; contentPane . add ( phoneLbl ) ; contentPane . add ( clientPhone ) ; contentPane . add ( tablesp ) ; contentPane . add ( quantLbl ) ; contentPane . add ( quantAmount ) ; contentPane . add ( dateLbl ) ; contentPane . add ( dateField ) ; contentPane . add ( hourLbl ) ; contentPane . add ( hourField ) ; contentPane . add ( amountLbl ) ; contentPane . add ( totalLbl ) ; contentPane . add ( totalAmount ) ; contentPane . add ( ACLbl ) ; contentPane . add ( ACAmount ) ; contentPane . add ( balanceLbl ) ; contentPane . add ( balanceAmount ) ; contentPane . add ( jButton1 ) ; } private void setStyle ( ) { } }

Fix:
jButton1 . setBounds ( 350 , 430 , 50 , 30 ) ;